Hammerable anchor bolt with deformable serrated apertures



Nov. 9, 1965 s. KAPLAN ETAL HAMMERABLE ANCHOR BOLT WITH DEFORMABLESERRATED APERTURES Filed April 23, 1964 United States Patent 3,216,305HAIWMERABLE ANCHQR BOLT WITH DEFORM- ABLE SERRATED APERTURES StanleyKaplan and Antonio Genna, both of 57 Florida St, Farmingdale, NX. FiledApr. 23, 1964, Ser. No. 362,121 1 Claim. (CI. 8577) This inventionrelates to an anchor bolt for masonry walls and more particularly to ananchor bolt that is locked to the borehole of the cylinder wall of themasonry cavity by means of hammer blows.

It is an object of this invention to provide an anchor bolt adapted forhammerable locking to the masonry wall in which the bolt is disposed.

It is another object to provide an anchor bolt having a split sleevecylinder and at least one cone disposed in an end of the sleeve.

It is a further object to provide a sleeve having a suitable cut lineleading to a suitable aperture to eltect a secondary sleeve locking ofthe sleeve to the masonry wall in contrast to a first sleeve locking tothe masonry wall at the inner hammered rim engaging the said walls.

These and other objects of this invention will become apparent uponreading the following descriptive disclosure of a plurality ofembodiments of this invention shown in the accompanying drawing inwhich;

FIG. 1 is a plan view of the anchor bolt disposed in a suitable boreholein masonry before being hammered in lace.

FIG. 2 is a view similar to FIG. 1 showing the sleeve hammered in placein the masonry cavity and showing locking at both the inner sleeve rimand also at a pheripheral band about the apertures therein, said bandbeing disposed in space relationship to the said inner mm.

FIG. 3 is an exploded view of the invention showing the two piececonstruction and an oval aperture in lieu of the round aperture of FIG.1.

FIG. 4 is an exploded view of a modification of this invention showingstar shaped apertures at each end with co-acting cones for each, and

FIG. 5 is a view of a modification like that FIG. 4 disposed in hammeredlocked relationship in a borehole.

Turning to the drawing a sheet metal cylindrical sleeve of suitablestrength and suitable length is preferably provided with an open seamline 11 (FIG. 3). The sleeve 10 is provided at its inner end, which endis insertable in a masonry cavity of predetermined depth, with at leastone cut line 12 leading to a suitably large aperture 13.

Preferably two cut line 12 aperture 13 combinations are employed andthese are spaced 120 degrees from the seam line 11 so that a pluralityof three skirt portions are present.

The cone 15 is of suitable inner diameter to fit suitably onto thesleeve 11 and of suitable outer diameter to closely fit into the masonrycavity.

When the cone 15 is press fitted onto the sleeve the lower rim of thesleeve, actually the rim formed by the three skirts, is disposed aboutone-half way down the slope of the cone. In this position the cone andits sleeve is insertable as a unit into the cavity in the masonry sothat a suitable portion of the sleeve extends beyond the masonry surface16.

This extended portion of the sleeve is hit with suitably strong hammerblows until the sleeves outer rim is flush ice with the masonry surface(FIG. 2). In this position the inner rim of the sleeve skirts is driveninto the masonry in a locked linear relationship 17 and the sleeveitself is buckled at the peripheral band 18 embracing both apertures 13.

Thus the anchor bolt is locked in the masonry cavity or well at twospaced-apart circular areas, namely linear area 17 and at the band area18.

The aperture 13 (round FIG. 1) may be provided with various otherconfigurations such as oval aperture 20 (FIG. 3). An angular aperturesuch as star-shaped aperture 21 (FIG. 4) is particularly suitable sinceit is easily deformed and the points thereof dig into the masonry wallto prevent rotation.

The cones 15 are each provided with threaded centrally disposedboreholes 15X to which fixtures are threaded after the anchor bolt hasbeen hammered into place.

The modification of this invention shown hammered into place in FIG. 5is provided with a locking band area 18X formed by hitting a top cone 15into place and also with a bottom locking band area 18 and a bottomlinear circular locking area 17.

As shown in the drawing the apertures in the sleeve are deformed andespecially in the aperture areas are the wrinkles or buckling of themetal sleeve predominant.

Thus the kind of apertures are important since some are more eifectivethan others.

This invention has been described by means of a plurality of embodimentshaving a plurality of variously shaped apertures to eifectuate easy andefficient buckling of the metal at the apertures when the sleeve ishammered into place.

But this invention is not limited to these embodiments nor to theseapertures used for illustrative purposes as it is an invention ofgeneric scope.

We claim:

A cylindrical anchor bolt for securing to a cylindrical cavity wall ofsuitable size comprising a hollow cylindrical metal sleeve which islongitudinally split from end to end, the internal diameter of saidsleeve being uniform, said sleeve having two apertures in suitablediametrical space-apart relationship said apertures being equally spacedcircumferentially from said split and disposed between the middle andone end of said sleeve, said apertures having a serrated edgeconfiguration to provide a plurality of pointed portions, said sleevebeing cut from each aperture to said one end, and a metal expanderhaving an external frusto-conical portion of suitable width adapted tobe disposed substantially completely within said sleeve when forcedtherein, whereby hammer blows on the sleeve forces the sleeve to slideon the cone surface spreading the sleeve portions between the cut linesthereby forcing the sleeve rim to lockingly engage the masonry wall atits base and to deform said apertures suitably adjacent said cone tobuckle the metal thereabout to enable said serrated portions toseizingly engage the cavity wall.

References Cited by the Examiner UNITED STATES PATENTS 1,120,368 12/14Booraem et a1. 74 1,372,035 3/21 Ogden 8585 1,852,297 4/32 Gelpcke 85672,686,547 8/54 Becker 8574 3,171,322 3/65 Kaplan 8577 EDWARD C. ALLEN,Primary Examiner.

